Piwigo 2.8.4 + 2.8.5

Holiday season has been a bit disturbed by security issues discovered in the email library we use on Piwigo (PHP Mailer). This is why we have released an "emergency" release 2.8.4 on December 27th and then release 2.8.5 on January 1st 2017.

Thanks to teekay, author of the excellent Bootstrap Darkroom theme, PHP Mailer embedded in Piwigo is now in version 5.2.21. Thank you very much for your help.

A few days ago, 3 "vulnerabilities" have been published about Piwigo 2.8.3/2.8.4 on Twitter and various security focused websites. They were reported by Shinkurt on Github weeks before that and he helped to fix them. We don't consider these security issues as "major" because only an administrator can exploit them. But anyway, it's good to have them fixed :-)